I see. Good. The only device that has no USB MIDI is the Ketron Sound Module. But for that I can use the MIDI DIN Out or my iConnectivity Mio XC Usb to MIDI DIN Converter.
In order to understand fully: With USB MIDI, it is always bidirectional, if I want it to be?
For instance, what I want to happen in this setup is the following:
Numa Piano playing MIDI is sent to the iPad to drive that Pianoteq 8 Steinberg Grand. Back comes USB Audio into the Numa.
At the same time, Cubasis 3 runs on the iPad to generate backing tracks, some are MIDI tracks and some are USB Audio tracks. These are sent to the UBS input of the Numa. The audio is sent by the Numa to it’s Audio output.
Organ playing at the Numa is mixed with the USB Audio from the iPad within the Numa.
The Bome Box processes the MIDI that comes in from the Numa and from the iPad and sends part of the MIDI back to the Numa (mainly program changes) and most of it to the Ketron Sound Box.
The only problem I can see with this setup is that the USB Hub outlets are USB-A and the outlet of the Bome Box is also USB-A, indicating that the Bome Box is kind of an USB Host. But I already have an USB Host, namely the iPad. But to avoid this problem, I could use the MIDI DIN ports of the Bome Box and connect it to the MIDI Hub via the iConnecticite Mio converter.